最土团购添加图片自动水印的办理方案

　　最土团购的措施，没有实现自动添加水印，其实这个成果并不难，只需要添加几行简朴的代码就能实现。

　　首先，需要一个添加水印的函数。网上各处都是，我随便找来一个，如下：

function setWater($imgSrc,$markImg,$markText,$TextColor,$markPos,$fontType,$markType)
{
 
    $srcInfo = @getimagesize($imgSrc);
    $srcImg_w    = $srcInfo[0];
    $srcImg_h    = $srcInfo[1];
 
    switch ($srcInfo[2])
    {
        case 1:
            $srcim =imagecreatefromgif($imgSrc);
            break;
        case 2:
            $srcim =imagecreatefromjpeg($imgSrc);
            break;
        case 3:
            $srcim =imagecreatefrompng($imgSrc);
            break;
        default:
            return;
    }
 
    if(!strcmp($markType,"img"))
    {
        if(!file_exists($markImg) || empty($markImg))
        {
            return;
        }
 
        $markImgInfo = @getimagesize($markImg);
        $markImg_w    = $markImgInfo[0];
        $markImg_h    = $markImgInfo[1];
 
        if($srcImg_w < $markImg_w || $srcImg_h < $markImg_h)
        {
            return;
        }
 
        switch ($markImgInfo[2])
        {
            case 1:
                $markim =imagecreatefromgif($markImg);
                break;
            case 2:
                $markim =imagecreatefromjpeg($markImg);
                break;
            case 3:
                $markim =imagecreatefrompng($markImg);
                break;
            default:
                return;
        }
 
        $logow = $markImg_w;
        $logoh = $markImg_h;
    }
 
    if(!strcmp($markType,"text"))
    {
        $fontSize = 30;
        if(!empty($markText))
        {
            if(!file_exists($fontType))
            {
                return;
            }
        }
        else {
            return;
        }
 
        $box = @imagettfbbox($fontSize, 0, $fontType,$markText);
        $logow = max($box[2], $box[4]) - min($box[0], $box[6]);
        $logoh = max($box[1], $box[3]) - min($box[5], $box[7]);
    }
 
    if($markPos == 0)
    {
        $markPos = rand(1, 9);
    }
 
    switch($markPos)
    {
        case 1:
            $x = +5;
            $y = +5;
            break;
        case 2:
            $x = ($srcImg_w - $logow) / 2;
            $y = +5;
            break;
        case 3:
            $x = $srcImg_w - $logow - 5;
            $y = +15;
            break;
        case 4:
            $x = +5;
            $y = ($srcImg_h - $logoh) / 2;
            break;
        case 5:
            $x = ($srcImg_w - $logow) / 2;
            $y = ($srcImg_h - $logoh) / 2;
            break;
        case 6:
            $x = $srcImg_w - $logow - 5;
            $y = ($srcImg_h - $logoh) / 2;
            break;
        case 7:
            $x = +5;
            $y = $srcImg_h - $logoh - 5;
            break;
        case 8:
            $x = ($srcImg_w - $logow) / 2;
            $y = $srcImg_h - $logoh - 5;
            break;
        case 9:
            $x = $srcImg_w - $logow - 5;
            $y = $srcImg_h - $logoh -5;
            break;
        default:
            return;
    }
 
    $dst_img = @imagecreatetruecolor($srcImg_w, $srcImg_h);
 
    imagecopy ( $dst_img, $srcim, 0, 0, 0, 0, $srcImg_w, $srcImg_h);
 
    if(!strcmp($markType,"img"))
    {
        imagecopy($dst_img, $markim, $x, $y, 0, 0, $logow, $logoh);
        imagedestroy($markim);
    }
 
    if(!strcmp($markType,"text"))
    {
        $rgb = explode(',', $TextColor);
 
        $color = imagecolorallocate($dst_img, $rgb[0], $rgb[1], $rgb[2]);
        imagettftext($dst_img, $fontSize, 0, $x, $y, $color, $fontType,$markText);
    }
 
    switch ($srcInfo[2])
    {
        case 1:
            imagegif($dst_img, $imgSrc);
            break;
        case 2:
            imagejpeg($dst_img, $imgSrc);
            break;
        case 3:
            imagepng($dst_img, $imgSrc);
            break;
        default:
            return;
    }
 
    imagedestroy($dst_img);
    imagedestroy($srcim);
}

　　把这个函数添加到/include/function/common.php文件中就行了，在需要用到的处所即可挪用。